Ventilator



Oct. 7, 1947. G. c. BREIDERT 2,428,544

VENTILATOR Filed April 18, 1944 2 Sheets-Sheet 1 Gis'ur'qs' C.Er'c'idEr-t Oct. 7, 1947. G. c. BREIDERT 4 VENTILATOR Filed April 18,1944 2 Sheets-Sheet 2 v mmvrox. Gaarqc Cifirc'z'dart 0 Patented Oct. 7,1947 UNITED STATES PATENT orricr.

VENTILA'IOR George C. Breidert, Glendale, Calif.

Application April 18 1944, Serial No. 531,561

2 Claims. (CI. 98-43) My invention has to do with ventilators of thetype employed for exhausting fumes and foul air from buildings.

In my Patent No. 2,269,428, issued January 13, 1942, I show a ventilatorof this type, which is adapted to be positioned on the roof of abuilding and in communication with the space to be ventilated by meansof suitable ducts. The construction of my said ventilator is such astocause air currents passing over the ventilator to create a vacuum onthe outlet openings of the ventilator which efiectively draws the fumesand foul air from the space to be ventilated.

There are times, however, when the exterior air currents are relativelylight or when the foul air load to be exhausted is unusually heavy, andthus it is desirable to increase the exhausting capacity of theventilator at those times, although, since suchincreased capacity is notalways required, it is also desirable that the normal exhaustingcapacity of the ventilator be not reduced by the capacity increasingmeans, and it is to this general feature of utility that my presentinvention is directed.

It is therefore among the objects of my present invention to provide aventilator of the windoperated type which incorporates means foraugmenting the exhausting capacity without interfering with the normalcapacity when the incorporated means are not used.

It is also an object of my invention to provide a fan ventilatorincorporating means for providing full efficiency of the fan despite aircurrents which ordinarily would materially reduce the efliciency of afan.

It is a further object of the invention to provide, in a ventilator, amotor and fan mounting which adequately protects the working parts fromexposure to rain, dust and other damaging elements.

. Another object is to provide a ventilator of this character which isdurable, highly eflicient, and easy to manufacture, install and repair.

My invention has still further advantages and features of novelty whichwill become apparent from the following description of two particularembodiments thereof which I have chosen for explanatory purposes. I wishit understood, however, that the invention is not to be limited to theprecise details now to be described since, in its broader aspects asdefined by the accompanying claims, it is capable of being carried outin other specific and modified forms of apparatus which the followingdescription will suggest to those skilled in the art.

In the drawings, which will be referred to in the ensuing description,

Fig. 1 is a side elevation, partly in section;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a section on line 33 of Fig. 1;

Fig. 4 is a view similar to Fig. 1 but showing a variational form ofapparatus;

Fig. 5 is a section on line 5-5 of Fig. 4;

Fig. 6 is a view taken on line 6-6 of Fig. 4; and

Fig. '7 is a fragmentary section showing a further modification.

Referring first to Figs. 1, 2 and 3, I show a ven-- tilator headhaving-a top wall I and a ring-like bottom wall 2, joined by outer sidebaflle members 6 and inner baffle members 1, in the manner shown in mysaid prior patent. There are four of the sides 6 and a like number ofbaflies I in the structure shown, although this number may be varied,said members being concentrically arranged and circumferentially spacedapart to provide outlet openings 10, ll. 'Each of the members 6, l isshaped to provide, in cross section, a V-shaped bulge Ga, 1a, thebaffles 6 having their side edges formed outwardly at an angle toprovide deflector tips [5. Horizontal baflles are provided by theperipheral portions of the wall members l and 2. The spaces 10, I I areof equal width and height. A conical hood I1 is secured to the top wallI as by brackets l8 and in practice I find that the height of the coneshould be approximately one-half its base diameter.

The head hereinabove described is mounted on a building roof R by meansof a flared tubular base or conduit 20 having attaching flanges 2i andterminating at its top end in a cylindrical neck 22, which neckterminates above the bottom wall 2 so that any moisture which mightenter between the baflle members 6 and 1 will be caught by the bottomwall 2 and prevented, by means of the neck, from entering the base. Thebottom Wall 2 is secured to the base as by brackets 23. Within theflared portion of .the base I secure a spider-shaped motor mountingsuspension bracket 24 which has a central portion 24a and radial arms24b, the arms beingsecured to-the flanges 240 of the central portion bybolts 25. The outer angled ends of the arms are secured to the innersurface of the base as by rivets.

A conventional electric motor M is secured axially in the bracket 24 anda fan 21 is secured axially on the motor drive shaft. While the fan issubstantially equal in diameter to that of the neck 22, it is disposedin the flared portion of the base below the neck so that" there is asum- A door 28 is provided through the side or the plant clearancearound the fan to compensate for the space occupied by the motor andfan. 1 whereby the ventilator may operate at full capacity under naturaldraft when the motor is not being operated.

base so that ready access may be hadto repair with my combinationstructure, the ventilator j may be used with full efliciency withoutoperating the fan when the foul air to be removed from the room is notof such quantity asto require i the combined action of both theventilator and fan, and then, when the additional capacity of l the fanis required, both the natural suction of the head and the exhaustingcapacity of the fan may be utilized with full efllciency.

In Figs. 4, 5 and 6 I show a variational form of apparatus embodyingmyinvention, in which .the ventilator head is as before described exceptthat here there is provided within the conical hood Ila a table 30supported on the top wall la and this table carries a bracket 3i towhich a j vertically disposed motor M is secured. The

drive shaft of the motor extends through the table and carries a drivepulley 33.

A vertical shaft extends axially through the 1 ventilator head, beingjournaled adjacent its top end in a bearing 36 carried by the top walland being journaled at its lower end in a thrust bearing 31 carried bythe spider-like bracket 40 whose legs 40a have their angled outer endssecured to the inner surface of the flared tubular base 42 I in themanner before described.

A fan 45 is secured axially on the lower end portion of the shaft 35within the flared portion 1 of the base below the neck 46 so that ampleclearance is provided around the fan to compensate for the spaceoccupied by the fan, bracket and tached to the cone and top wall byscrews 53.

thrust bearing and thereby to permit emcient op- In Fig. 7 I show afurther modification wherein the parts are as shown in Figs. 4-6 exceptthat cone llb is frustrumed and a conical cover is mounted over thefrustrum by brackets 6| in spaced relation to cone ill) to permitimproved ventilation for the motor M.

The advantage of the construction shown in Figs. 4-7 is that the motoris completely isolated from the path of air passing through theventilator and is thus protected against dust, moisture, fumes orexcessive heat.

I claim.

1. A ventilating device for exhausting air from a structure, comprisinga conduit adapted to be secured over an opening in the structure, saidconduit tapering from its bottom to a cylindrical discharge end portion,a ventilator comprising top and bottom walls spaced apart by concentricrows of circumferentially spaced vertically disposed baflles, saidbottom wall having an axial opening into which the cylindrical portionof the conduit projects, a spider secured to the side wall of thetapered portion of the conduit and disposed transversely of the conduit,an exhaust fan member supported by the spider to rotateabout an axiscoaxial with the conduit, said fan being disposed in the top end of thetapered portion immediately adjacent the cylindrical portion of .theconduit andbeing of a diameter substantially equal to the insidediameter of said cylindrical portion, and power driven actuating meansoperatively connected to the fan.

2. The device of claim 1 wherein the actuating means consists of a motorcarried by the spider and wherein the cross-sectional area of theconduit within which are mounted the fan, motor and spider issufficiently greater than the cross-sectional area of the cylindricalportion of the conduit to compensate for the area occupied by the fan,motor and spider.

GEORGE C. BREIDERT.

REFERENCES orrnn The following references are of record in the file ofthis patent:

UNITED STATES PATENTS I Number Name Date 214,024 Converse Apr. 8, 1879343,652 Trobridge June 15, 1886 1,409,199 Roth Mar. 14, 1922 1,773,453Flettner Aug. 19, 1930 1,879,450 Palmer Sept. 27,1932 1,986,176 ZwerlingJan. 1, 1935 2,082,955 Hagen June 8, 1937 2,171,883 McDerment Sept. 5,1939 2,235,927 Handley Mar. 25, 1941 2,269,428 Breidert Jan. 13, 19422,279,620 Hirschman Apr. 14, 1942 2,306,727 Hill Dec. 29, 1942 2,322,302Martinson June 22, 1943 FOREIGN PATENTS Number Country Date 403,324Germany Sept. 30, 1924 530,762

Germany July 31, 1931

